ST. LOUIS, MO (KTVI)- You need to be fit if you’re going to go extreme white water rafting in Africa on Zimbabwe’s Zambezi River. That’s what orthopedic surgeon Dr. Richard Lehman just did on his family vacation.

Does this qualify as an explosive exercise?

He joined us to discuss how high-intensity workouts contribute to an increase in bone and joint damage among patients under the age of 30.